Electrostatic spray gun extension tube



FIG. 1 is an end perspective view of an electrostatic spray gun extension tube showing my new design;

FIG. 2 is a side perspective view thereof;

FIG. 3 is a side elevational view thereof, the opposite and adjacent sides being identical in appearance; and

FIG. 4 is an end elevational view thereof, the opposite end being substantially similar in appearance. 

The ornamental design for an electrostatic spray gun extension tube, as shown and described. 